Heating device



Jan. 29, 1929. 1,700,559

L. F. CLAUSING HEATING DEVICE Original Filed NOV. 10, 1923 INVENTOR 2laws FCMasM a ATTOR N EY Patented Jan. 29, 1929.

UNITED. STATES PATENT OFFICE.

LOUIS F. CLAUSING, 0F BURLINGAME, CALIFORNIA, ASSIGNOR T0 ROYAL METALWORKS, A COPARTNERSHIP CONSISTING OF LOUIS F. CLAUSING AND MAX SCHWARTZ,OF SAN FRANCISCO, CALIFORNIA.

' HEATING DEVICE.

Original application filed November 10, 1923, Serial No. 674,096.Divided and this application filed April 8, 1925. Serial No. 21,628.

The present invention relates to improvements in heaters and hasparticular reference to control means for a gas heater having electricalignition means, the present application being a division of theco-pending applicatlon Serial No. 674,096, filed November 10th, 1923.

The principal object of the present lnvention is to provide means for acommon control of the valve of a gas heater and a spark plug mounted inoperative proximity to the burner for igniting the gas.

It is particularly proposed in the present invention to provide anoperating element for the valve by means of which the latter may beopened and closed and means in connection therewith for closing theswitch when the vale is open, the latter means being arranged toautomatically open the switch after the object of igniting the gas hasbeen attained.

It is further proposed in the present invention to provide means wherebya high tension current may be used for igniting the gas.

Further objects and advantages of my device will appear as thespecification proceeds.

The preferred form of my invention is illustrated in the accompanyingdrawing, in which Figure 1' shows a vertical section of my heater havingthe common control for the gas valve and the electrical switchassociated therewith. I I Figure 2 a horizontal section taken along lineIIII of Figure 1.

Figure 3 a horizontal section through the switch used in the deviceshown in Figure 1.

Figure 4 a perspective detail View illustrating a modified commoncontrol for the valve and the switch.

Figure 5 a perspective view illustrating another modification of theCommon control..

My heater 1 is fully described in the co-.

pending application previously referred to and comprises in itsprincipal features a rectangular box 2 adapted to be installed in thefloor 3 of a room and to be supported on two adjacent joists 4 with aregister 6 presented on top of the box. A radiator 5 which is moreparticularly described in the co-pending application is disposedcentrally relative to the box/and. a burner 7 is arranged near thebottom end thereof which latter communicates with a gas pipe 8, the portarea of which may be controlled by a suitable valve 9. The latter may beof any suitable make and terminates in a vertically presented valve stem11 formed with an angular socket 12 in the top thereof adapted toreceive the angular lower end of an operating element 13 extendingupwardly through the bottom 14.- of the box 2 into a perforation 1.6 inthe register 6 and adapted to be manipulated by means of a key 17 Thebottom end of the operating element 13 which extends into the socket 12is made of the same angular cross-section as the socket 12 but slightlysmaller so as to allow of limited play of the operating element relativeto the socket.

The revolving motion of the valve stem 11 is limited by means of a smallprojection 18 striking a stop 19 when the valve is fully open.

In operative proximity to the burner 7 there is mounted a spark plug 21adapted to ignite the gas when a spark is caused to urnp from one of itselectrodes 22 to the other elec trode 23. The spark plug forms part of ahigh tension circuit 22, the latter including the secondary 23 of aninduction coil, the primary 24 of which is connected at one end throughthe wire 26 and the switch 27 with one side of the battery 28 while theother end is connected through the wire 29 with a vibrating armature 31which latter intermittently makes contact with the wire 32 connectingwith the other side of the battery 28.

The switch used in this arrangement is illustrated in Figure 3 andcomprises a plunger 33 slidable in the cylinder 34 mounted in the box36, the plunger connecting through a stem 37 with one contact 38 bearingon the end 39 of the cylinder 34 with a spring 11 tending to force thecontact 'upon its seat. Mounted oppositely the contact is a stationarycontact 42 and the-m0vable contact 38 fa u may be engaged with thestationary contact -12 for closing a. circuit by depressing the plunger33 against the opposition of the spring -11. The plunger may bedepressed by meansot a short arm 44, extending from the operatingelement 13 when the latter is manipulated for closing the valve 9.

The device thus far described operates as follows:

To open the valve 9, the operating element 13 is turned by means of thekey 17 and just before reaching the full open position, the arm letengages with the plunger 33 and forces the contact 38 upon the contact12 whereby the primary circuit is closed and a SJEll'li caused to jumpthe gap between the two electrodes 22 and 23 of the spark plug 21. Whenthe operator releases the operating member 13 by withdrawing his key,the spring 41 forces the plunger 33 outwardly and'this motion does notinvolve a closing movement of the valve 9 due to the fact that theoperating element 13 engages the socket 12 of the valve stem with acertain amount of play so that the switch may open due to the tension ofthe spring -l1 without affecting the position of the valve.

In Figure a is shown a modified form of common control for the valve andthe spark plug. In this form, which is illustrated in the drawing of theco-pending application, the switch comprises a stationary contact 46mounted in a bracket 17 secured to the radiator l8 and a movable contact49 mounted on the arm lat of the operating member 13.

- A spring 51 encircles the operating element 13 and is secured with oneend on the arm 41, as shown at 52, while its other end is fastened tothe valve stem 11, as shown at 53. The spring 51 is sufiiciently strongto normally prevent play between the valve stem 11 and the operatingelement 13 until the projection 18 ot' the valve stem strikes the stop19. When this occurs the contact 49 on the arm st-l is still out ofengagement with the stationary contact 46 but the fact that theoperating element 13 has a certain amount of play in the socket of thevalve stem 11 allows the operating element to be turned further againstthe resistance of the spring 51 to establish engagement between the twocontacts, the spring immediately disengaging the movable contact fromthe stationary contact as soon as the operating element 13 is releasedby the operator.

A still different form by which the same object may be accomplished isshown in Figure 5 in which the stationary contact is formed by thebracket 54: secured to the radiator t8 and the movable contact by aspring 56 secured to the operating element 13 as shown at 57 andextending from the latter in such a manner that when the operatingelement is turned the free end 58 of the spring 56 strikes a stop 59which, however, allows the central portion 61 of the spring to be forcedstill further so as to come in contact with the stationary contact 54,the tension of the spring 56 eti'ecting disengagement as soon as theoperating element 13 is released by the manipulator.

In the form shown in Figure 6, a slightly different scheme is followed:

A sleeve 71 is arranged around the operating element 13 and is supportedrelative to the operating element by means of a spring 72 connecting anexternal collar 73 on the operating element with an internal shoulder 7%in the sleeve. The spring is arranged to normally hold the sleeve insuch a position that its upper end is almost flush with the upper end ofthe operating element 13. To manipulate the operating element it isrequired that a key 76 be slipped over its upper end and this key canget a suflicient hold for operating the element 13 onlyafter the sleeve71 is depressed against the opposition of the I spring 7 :2. The sleeveconstitutes the movable contact of the switch While a stationary contact77 is mounted on a bracket 78 in operative proximity to the lowerend ofthe sleeve so that when the latter is depressed by the insertion of thekey, the two contacts engage for closing the circuit.

I claim:

1. In a heater of the character described, a gas burner, a control valvefor the same formed with an angular socket in the stem thereof, anoperating element for the valve extending into the socket with limitedplay in said socket and having spring means associated therewithopposing such play, electrical ignition means for the gas including anelectrical circuit and a switch for the same and means allowing theoperating element to close the switch when the same is manipulated foropening the valve, the spring means serving to move the operatingelement out of the switch closing position when the operating element isreleased.

2. In combination with a gas heater having a gas supply valve, anelectric ignition device adapted to light the heater, a switch forcontrolling the current to said ignition device, spring means tending toforce said switch open, a loosely fitting wrench for operating saidvalve and having a projection adapted to force the switch closed whenthe wrench is turned to open the valve; said wrench being a loose fit toprovide play permittingsaid spring to open the switch when the wrench isreleased without moving the valve.

LOUIS F. CLAUSING.

